Environment-friendly papermaking white water recycling device

Abstract

The utility model relates to the technical field of papermaking white water treatment, in particular to an environment-friendly papermaking white water recycling device which comprises a pretreatment box, an air flotation separation box is arranged on one side of the pretreatment box, an adsorption filtering tower is arranged on the other side of the air flotation separation box, and an inclined screen is arranged in the middle of the pretreatment box. The top end of the other side of the pretreatment box is fixedly connected with a collection box, the bottom end of the pretreatment box is fixedly connected with an arc-shaped filter screen, the bottom end of the other side of the pretreatment box is fixedly connected with a backflushing water pump, the bottom end of the air flotation separation box is fixedly connected with an air inlet pipe, and the top end of the air inlet pipe is uniformly and fixedly connected with a plurality of microporous aeration heads; through the arrangement of the pretreatment box, the air flotation separation box and the adsorption filtration tower, fibers, suspended particles, colloidal substances, soluble organic matters and heavy metal ion impurities in the white water can be effectively removed, so that the quality of the treated white water meets the requirements of water for papermaking production, and the paper quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of papermaking white water treatment technology, specifically to an environmentally friendly papermaking white water recycling device. Background Technology

[0002] Wastewater from the papermaking industry can be divided into two types: sulfate pulp wastewater and sulfite pulp wastewater. Among them, the wastewater discharged from the pulping process is the most polluting. The black-brown wastewater discharged during pulp washing is called black liquor. The wastewater discharged from the bleaching process contains acid, alkali and BOD substances. In the papermaking process, the wastewater discharged from the paper machine is called white water. Black liquor and white water are the main wastewaters in the papermaking industry.

[0003] Traditional white water treatment methods, such as simple sedimentation and filtration, are difficult to effectively remove dissolved organic matter and colloidal substances from white water. These residual impurities can affect the quality of paper, causing problems such as spots and reduced paper strength.

[0004] Fibers and filler materials in white water can easily accumulate in the filter components and pipes of the treatment equipment, causing blockages. For example, when using filtration equipment, the filter screen will quickly become clogged, requiring frequent cleaning or replacement, which affects the continuous operation and service life of the equipment. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an environmentally friendly papermaking white water recycling device, which can effectively solve the problems mentioned in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides an environmentally friendly papermaking white water recycling device, comprising: a pretreatment tank, an air flotation separation tank on one side of the pretreatment tank, an adsorption filter tower on the other side of the air flotation separation tank, an inclined screen in the middle of the pretreatment tank, a collection tank fixedly connected to the top of the other side of the pretreatment tank, an arc-shaped filter screen fixedly connected to the bottom of the pretreatment tank, a backwash water pump fixedly connected to the bottom of the other side of the pretreatment tank, an air inlet pipe fixedly connected to the bottom of the air flotation separation tank, a plurality of microporous aeration heads evenly fixedly connected to the top of the air inlet pipe, and a slag scraping device at the top of the air flotation separation tank.

[0008] Furthermore, a through hole is provided on one side of the pretreatment box, and a filter screen is fixedly connected to the side of the pretreatment box below the through hole. A bracket is fixedly connected to the inner wall surface of the pretreatment box, and the bracket is located at the bottom of the inclined screen.

[0009] Further, the first water pump is fixedly connected to the bottom end of one side of the pretreatment box, the output end of the first water pump is fixedly connected with a first connecting pipe, the top end of the first connecting pipe is fixedly connected with a first valve, and the other end of the first connecting pipe is fixedly connected with the gas float separation tank.

[0010] Further, the scraping device comprises sliding rails, the sliding rails are fixedly connected to the two sides of the top end of the gas float separation tank, one end of the sliding rail is fixedly connected with a servo motor, the output end of the servo motor is connected with a threaded rod through a spline, and the threaded rod is rotatably connected to the middle part of the sliding rail.

[0011] Further, the middle part of the sliding rail is slidably connected with a cross rod, threaded holes are formed in the two ends of the cross rod, the threaded holes are threadedly connected with the threaded rod, and the bottom end of the cross rod is fixedly connected with a scraper.

[0012] Further, the second water pump is fixedly connected to the bottom end of the other side of the gas float separation tank, the output end of the second water pump is fixedly connected with a second connecting pipe, the top end of the second connecting pipe is fixedly connected with a second valve, and the other end of the second connecting pipe is fixedly connected with the adsorption filter tower.

[0013] Further, the adsorption filter tower is internally provided with activated carbon particles and ion exchange resin, and the top end of the adsorption filter tower is fixedly connected with a water outlet pipe.

[0014] Compared with the prior art, the technical scheme has the following beneficial effects:

[0015] 1. Through the arrangement of the pretreatment box, the gas float separation tank and the adsorption filter tower, the long fibers and large particle impurities in the white water are first filtered by the pretreatment box, then the colloidal particles, fine fibers and part of the dissolved organic matter impurities in the white water after pretreatment are separated by the gas float separation tank, and finally the residual dissolved organic matter, pigment, heavy metal ions and part of the dissolved salts in the white water are adsorbed by the adsorption filter tower, so that the fibers, suspended particles, colloidal substances, dissolved organic matter and heavy metal ion impurities in the white water can be effectively removed, the water quality of the treated white water meets the water requirement for papermaking production, and the paper quality is improved.

[0016] 2. Through the arrangement of the inclined screen and the backflushing water pump, most of the fibers and suspended particles in the white water are filtered by the inclined screen, so as to reduce the burden of the arc-shaped filter screen and reduce the probability of clogging of the arc-shaped filter screen. When the arc-shaped filter screen is clogged, the backflushing water pump can be started to flush water into the interior of the arc-shaped filter screen to clean the arc-shaped filter screen, so as to achieve the effect of self-cleaning, further ensure the continuous and stable operation of the equipment, and prolong the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings described in the following are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Fig. 1 It is a whole structure schematic diagram of the present application;

[0019] Fig. 2 It is a whole front view structure schematic diagram of the present application;

[0020] Fig. 3 It is a pretreatment box structure schematic diagram of the present application;

[0021] Fig. 4 It is a gas float separation tank structure schematic diagram of the present application;

[0022] Fig. 5 It is a slag scraping device structure schematic diagram of the present application;

[0023] Fig. 6 It is an adsorption filter tower structure schematic diagram of the present application.

[0024] The numbers in the drawings respectively represent:

[0025] 1, pretreatment box; 101, through hole; 102, filter screen; 103, support; 2, inclined screen; 3, collection box; 4, arc-shaped filter screen; 5, backflushing water pump; 6, first water pump; 7, first connecting pipe; 701, first valve; 8, gas float separation tank; 9, air inlet pipe; 10, microporous aeration head; 11, slag scraping device; 1101, slide rail; 1102, servo motor; 1103, threaded rod; 1104, cross bar; 1105, threaded hole; 1106, scraper; 12, second water pump; 13, second connecting pipe; 1301, second valve; 14, adsorption filter tower; 15, water outlet pipe. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] The present application will be further described in combination with the embodiments.

[0028] Embodiment 1:

[0029] With reference to Figs. 1-6 , the utility model discloses a first embodiment, discloses environmental protection type papermaking white water recycling device, include: pretreatment box 1, the one side of pretreatment box 1 is provided with air floatation separation tank 8, the other side of air floatation separation tank 8 is provided with adsorption filter tower 14, the middle part of pretreatment box 1 is provided with inclined screen 2, the top of the other side of pretreatment box 1 is fixedly connected with collection box 3, the bottom of pretreatment box 1 is fixedly connected with arc filter screen 4, the bottom of the other side of pretreatment box 1 is fixedly connected with backflushing water pump 5, the bottom of air floatation separation tank 8 is fixedly connected with air inlet pipe 9, the top of air inlet pipe 9 is evenly fixedly connected with a plurality of microporous aeration head 10, the top of air floatation separation tank 8 is provided with slag scraping device 11.

[0030] through the setting of pretreatment box 1, air floatation separation tank 8 and adsorption filter tower 14, when using, first through pretreatment box 1, the long fiber in white water and the large particle impurities are handled, then through air floatation separation tank 8, the colloidal particles, small fiber and part of the dissolved organic matter impurities in the white water after pretreatment are handled, finally through adsorption filter tower 14, the dissolved organic matter, pigment, heavy metal ion and part of the dissolved salt in white water are handled, thereby can effectively remove the fiber, suspended particles, colloidal substance, dissolved organic matter and heavy metal ion impurities in white water, make the water quality after treatment satisfy the papermaking production water requirement, improve paper quality.

[0031] Embodiment 2:

[0032] With reference to Figs. 1-6 , the utility model's second embodiment, this embodiment is different from the first embodiment is:

[0033] The side of pretreatment box 1 is provided with through -hole 101, the side of pretreatment box 1 is fixedly connected with filter screen 102 below through -hole 101, the inner wall surface of pretreatment box 1 is fixedly connected with support 103, support 103 is located at the bottom end of inclined screen 2, the bottom end of the side of pretreatment box 1 is fixedly connected with first water pump 6, the output of first water pump 6 is fixedly connected with first connecting pipe 7, the top of first connecting pipe 7 is fixedly connected with first valve 701, the other end of first connecting pipe 7 is fixedly connected with one side of air floatation separation tank 8.

[0034] The scraping device 11 comprises slide rails 1101 fixedly connected at two sides of the top end of the air floatation separation tank 8, one end of each slide rail 1101 is fixedly connected with a servo motor 1102, the output end of the servo motor 1102 is connected with a threaded rod 1103 through a spline, the threaded rod 1103 is rotatably connected at the middle part of the slide rail 1101, the middle part of the slide rail 1101 is slidably connected with a cross rod 1104, threaded holes 1105 are formed at two ends of the cross rod 1104, the threaded holes 1105 are threadedly connected with the threaded rod 1103, and the bottom end of the cross rod 1104 is fixedly connected with a scraper 1106.

[0035] The bottom end of the other side of the air floatation separation tank 8 is fixedly connected with a second water pump 12, the output end of the second water pump 12 is fixedly connected with a second connecting pipe 13, the top end of the second connecting pipe 13 is fixedly connected with a second valve 1301, and the other end of the second connecting pipe 13 is fixedly connected with one side of an adsorption filter tower 14.

[0036] Through the arrangement of the inclined screen 2 and the backflushing water pump 5, most of the fibers and suspended particles in the white water are filtered through the inclined screen 2 during use, so as to reduce the burden of the arc-shaped filter screen 4 and reduce the probability of the arc-shaped filter screen 4 being blocked, when the arc-shaped filter screen 4 is blocked, the arc-shaped filter screen 4 can be washed by starting the backflushing water pump 5 to flush water into the arc-shaped filter screen 4, so as to achieve the effect of self-cleaning, further ensure the continuous and stable operation of the equipment, and prolong the service life of the equipment.

[0037] The remaining structure is the same as that of example 1.

[0038] The working process of the utility model is as follows:

[0039] Firstly, the white water is injected into the inside of the pretreatment tank 1, the white water passes through the inclined screen 2, the inclined screen 2 has a certain inclination angle, the white water flows from above the screen surface, under the action of gravity and water flow, the long fibers in the white water are intercepted by the inclined screen 2 and flow into the inside of the collecting tank 3 along the screen surface for collection, the white water flowing into the inside of the collecting tank 3 will flow back to the inside of the pretreatment tank 1 through the filter screen 102, then the first valve 701 is opened and the first water pump 6 is started to convey the white water in the inside of the pretreatment tank 1 to the inside of the air floatation separation tank 8, the white water is filtered again through the arc-shaped filter screen 4 during the conveying process, through the arrangement of the inclined screen 2 and the backflushing water pump 5, most of the fibers and suspended particles in the white water are filtered through the inclined screen 2 during use, so as to reduce the burden of the arc-shaped filter screen 4 and reduce the probability of the arc-shaped filter screen 4 being blocked, when the arc-shaped filter screen 4 is blocked, the arc-shaped filter screen 4 can be washed by starting the backflushing water pump 5 to flush water into the arc-shaped filter screen 4, so as to achieve the effect of self-cleaning, further ensure the continuous and stable operation of the equipment, and prolong the service life of the equipment.

[0040] Secondly, when the white water inside the pre-treatment tank 1 is transported, the first valve 701 and the first water pump 6 are closed, then the air inlet pipe 9 is connected with compressed air, a large amount of small bubbles are introduced into the water through the micro-porous aeration head 10, the colloidal particles, fine fibers and part of the dissolved organic matter impurities in the white water will adhere to the bubbles, and then the servo motor 1102 is started to drive the threaded rod 1103 to rotate, the rotation of the threaded rod 1103 will drive the scraper 1106 to move at the top of the air floatation separation tank 8 to scrape off and collect the sludge;

[0041] Finally, the second valve 1301 is opened and the second water pump 12 is started to transport the white water inside the air floatation separation tank 8 to the inside of the adsorption filter tower 14, the adsorption filter tower 14 is filled with activated carbon particles and ion exchange resin, the activated carbon can adsorb the residual dissolved organic matter and pigment in the white water, and the ion exchange resin can remove heavy metal ions and part of the dissolved salts in the white water, the adsorption filter tower 14 adopts a countercurrent design, the white water enters from the bottom of the tower, and after fully contacting with the adsorbent, it flows out from the top water outlet pipe 15, improving the adsorption efficiency, through the setting of the pre-treatment tank 1, the air floatation separation tank 8 and the adsorption filter tower 14, the long fibers and large particle impurities in the white water are filtered and treated through the pre-treatment tank 1 first, then the colloidal particles, fine fibers and part of the dissolved organic matter impurities in the white water after pre-treatment are separated through the air floatation separation tank 8, and finally the residual dissolved organic matter, pigment, heavy metal ions and part of the dissolved salts in the white water are adsorbed through the adsorption filter tower 14, so that the fibers, suspended particles, colloidal substances, dissolved organic matter and heavy metal ion impurities in the white water can be effectively removed, the quality of the treated white water can meet the requirements of papermaking production water, and the paper quality is improved.

[0042] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. An environmentally friendly papermaking white water recycling device, characterized in that, Include: Preprocessing box (1), one side of the preprocessing box (1) is provided with air floatation separation tank (8), the other side of the air floatation separation tank (8) is provided with adsorption filter tower (14), the middle part of the preprocessing box (1) is provided with inclined screen (2), the top end of the other side of the preprocessing box (1) is fixedly connected with collecting box (3), the bottom end of the preprocessing box (1) is fixedly connected with arc filter screen (4), the bottom end of the other side of the preprocessing box (1) is fixedly connected with backflushing water pump (5), the bottom end of the air floatation separation tank (8) is fixedly connected with air inlet pipe (9), the top end of the air inlet pipe (9) is uniformly fixedly connected with a plurality of microporous aeration heads (10), the top end of the air floatation separation tank (8) is provided with slag scraping device (11).

2. The environmentally friendly papermaking white water recycling device according to claim 1, characterized in that, The side of the preprocessing box (1) is provided with a through hole (101), the side of the preprocessing box (1) is fixedly connected with a filter screen (102) below the through hole (101), the inner wall surface of the preprocessing box (1) is fixedly connected with a support (103), and the support (103) is located at the bottom end of the inclined screen (2).

3. The environmentally friendly papermaking white water recycling device according to claim 1, characterized in that, The bottom end of the side of the preprocessing box (1) is fixedly connected with a first water pump (6), the output end of the first water pump (6) is fixedly connected with a first connecting pipe (7), the top end of the first connecting pipe (7) is fixedly connected with a first valve (701), and the other end of the first connecting pipe (7) is fixedly connected with the side of the air floatation separation tank (8).

4. The environmentally friendly papermaking white water recycling device according to claim 1, characterized in that, The slag scraping device (11) comprises a sliding rail (1101), the sliding rail (1101) is fixedly connected on both sides of the top end of the air floatation separation tank (8), one end of the sliding rail (1101) is fixedly connected with a servo motor (1102), the output end of the servo motor (1102) is connected with a threaded rod (1103) through a spline, and the threaded rod (1103) is rotatably connected in the middle part of the sliding rail (1101).

5. The environmentally friendly papermaking white water recycling device according to claim 4, characterized in that, The middle part of the sliding rail (1101) is slidably connected with a cross rod (1104), the both ends of the cross rod (1104) are provided with threaded holes (1105), the threaded holes (1105) are threadedly connected with the threaded rod (1103), and the bottom end of the cross rod (1104) is fixedly connected with a scraper (1106).

6. The environmentally friendly papermaking white water recycling device according to claim 1, characterized in that, The bottom end of the other side of the air floatation separation tank (8) is fixedly connected with a second water pump (12), the output end of the second water pump (12) is fixedly connected with a second connecting pipe (13), the top end of the second connecting pipe (13) is fixedly connected with a second valve (1301), and the other end of the second connecting pipe (13) is fixedly connected with the side of the adsorption filter tower (14).

7. The environmentally friendly papermaking white water recycling device according to claim 1, characterized in that, The inside of the adsorption filter tower (14) is provided with activated carbon particles and ion exchange resin, and the top end of the adsorption filter tower (14) is fixedly connected with a water outlet pipe (15).

Images